Date: Tue, 9 Jul 2013 11:56:43 -0400 From: John Baldwin <jhb@freebsd.org> To: freebsd-current@freebsd.org Cc: Matthias Petermann <matthias@d2ux.net> Subject: Re: Fixing X220 Video The Right Way (and trying to apply the same fix to X121e) Message-ID: <201307091156.43848.jhb@freebsd.org> In-Reply-To: <20130708104128.Horde.4uMDgEJsnvTlAjpUPueiyQ1@d2ux.org> References: <512A6FFF.2060603@gmail.com> <201306141139.16728.jhb@freebsd.org> <20130708104128.Horde.4uMDgEJsnvTlAjpUPueiyQ1@d2ux.org>
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On Monday, July 08, 2013 4:41:28 am Matthias Petermann wrote:
>
> Hello,
>
> I applied the patch, trying to get brightness controls for my X121e.
>
> But it looks like I need a different loader.conf setting.
>
> hw.pci0.0.2.0.handle="\\\\_SB_.PCI0.PEG.VID"
>
> doesn't work. In my ASl there is only one device providing DOD / DOS:
>
> Scope (_SB.PCI0)
> {
> Device (GFX0)
> {
> Name (_ADR, 0x00020000) // _ADR: Address
> Method (_DOS, 1, NotSerialized) // _DOS: Disable Output
> Switching
> {
> Store (And (Arg0, 0x07), DSEN)
> If (LEqual (And (Arg0, 0x03), Zero))
> {
> If (CondRefOf (HDOS))
> {
> HDOS ()
> }
> }
> }
>
> Method (_DOD, 0, NotSerialized) // _DOD: Display Output
Devices
> {
> If (CondRefOf (IDAB))
> {
> IDAB ()
> }
> Else
> {
So this is the \_SB_.PCI0.GFX0 device. However, you should kldload acpi_video
and see if it already attaches to this device (devinfo -v can be helpful here
as it will show the ACPI handle of the parent of the acpi_video device). If
it does, then this patch can't help you.
--
John Baldwin
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